CAJ | 학술논문

设计了一种基于电场边缘效应的管式土壤水分传感器. 为了研究圆环电极几何结构对水分传感器灵敏度及有效测量范围的影响,采用有限元分析软件Maxwell 分析了不同参数组合下探头的电场分布和电容变化,得到了传感器探头最优结构参数组合. 试验表明:优化后的土壤水分自制传感器测量值与传统烘干法测量值对比,两者决定系数 R2=0.997 6,最大绝对误差为1.60%,提高了传感器的测量精度,可应用于农业生产实践中.
설계료일충기우전장변연효응적관식토양수분전감기. 위료연구원배전겁궤하결구대수분전감기령민도급유효측량범위적영향,채용유한원분석연건Maxwell 분석료불동삼수조합하탐두적전장분포화전용변화,득도료전감기탐두최우결구삼수조합. 시험표명:우화후적토양수분자제전감기측량치여전통홍간법측량치대비,량자결정계수 R2=0.997 6,최대절대오차위1.60%,제고료전감기적측량정도,가응용우농업생산실천중.
A tube access soil moisture sensor based on marginal effect of electric field was developed .Maxwell finite ele-ment analysis software analyzes the electric field distribution and capacitance , and how axial length of probe electrode or axial spacing length of two rings influence sensitivity and effective range , find the optimal combination of sensor probe structure .The results showed that the value of comparative measure this moisture sensor measurements with conventional drying method, the coefficient of determination R2=0.997 6 , the maximum absolute error of 1.60%.Improved the measurement accuracy of the sensor can be used in agricultural production practices .